US4429592A - Valve operator - Google Patents
Valve operator Download PDFInfo
- Publication number
- US4429592A US4429592A US06/270,948 US27094881A US4429592A US 4429592 A US4429592 A US 4429592A US 27094881 A US27094881 A US 27094881A US 4429592 A US4429592 A US 4429592A
- Authority
- US
- United States
- Prior art keywords
- cylindrical member
- shaft
- clutch
- frame
- ball nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/05—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor specially adapted for operating hand-operated valves or for combined motor and hand operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/14—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19642—Directly cooperating gears
- Y10T74/19698—Spiral
- Y10T74/19702—Screw and nut
Definitions
- the present invention relates generally to valve operators, and more particularly to a valve operator of the type which is normally automatically actuated, but which can also be manually actuated.
- Manual actuators for automatic control valves of the type in which the valve element is moved linearly generally incorporate a power screw rotated by a handwheel.
- a worm gear set between the handwheel and the power screw is often required to multiply the torque applied to the valve element.
- the power screw is usually mounted above the automatic actuator and in line with the valve stem and actuator shaft, the power screw pushing or pulling on the actuator shaft which operates the valve stem.
- the manual actuator is self-locking so that unbalanced loads on the valve element cannot change the valve position when the operator is in its manual mode of operation. Since the valve element must be free to move when in the automatic mode of operation, it is necessary to stroke the manual actuator of a self-locking unit into a retracted position when valve operation is transferred from the manual to the automatic mode of operation. Also, when it is desired to transfer from the automatic mode to the manual mode, it is necessary to stroke the manual actuator until its position coincides with that of the valve before manual actuation of the valve can begin. This requirement of stroking the manual actuator when transferring from one mode to the other mode of operation is time and energy consuming and can put a practical limitation on the length of stroke of the valve element which this type of operator can accommodate and causes delays relative to emergency operation.
- the present invention solves the aforementioned problems associated with the prior art as well as other problems by providing a ball screw which is in constant engagement with the valve element to apply linear motion to the valve element upon actuation of the automatic operator, and a ball nut which drives the ball screw in the manual mode of operation.
- a worm gear which is rotated by a handwheel, engages a worm wheel which selectively engages the ball nut by means of a clutch mechanism.
- the clutch In the automatic mode of operation, the clutch is left in its disengaged position, and the ball nut merely rotates freely with the ball screw.
- the clutch is engaged in any position of the valve mechanism, connecting the ball nut to the handwheel by means of the worm gear and worm wheel, whereupon the ball screw is rotated by the ball nut to operate the valve mechanism.
- FIG. 1 is a cross-sectional view of the valve operator constructed in accordance with the present invention.
- FIG. 2 is a cross-sectional view taken along section-indicating lines 2--2 of FIG. 1.
- FIG. 1 illustrates a valve operator 10 comprising an annular frame 12 which is bolted or otherwise attached to a portion of a valve body 14, a cover member 16 bolted to the frame 12 by means of bolts 17, an automatic valve stem drive assembly 18 bolted or otherwise attached to the cover member 16, and a manual valve stem drive assembly 20 rotatably mounted within the frame 12.
- the automatic valve stem drive assembly 18 is of known construction and will not be described herein in detail.
- the assembly 18 comprises an air cylinder with piston rod 24, a first coupling 26 which is engaged with the piston rod 24, and an elongated drive shaft in the form of a ball screw 28 which is coupled at one end to the piston rod 24 by means of the coupling 26.
- the opposite end of the ball screw 28 is coupled to a valve stem 27 by means of a second coupling 29.
- the manual valve stem drive assembly 20 is comprised of a ball nut 30 engageable with the ball screw 28 in a conventional manner, a ball nut adapter 32 pressed into or otherwise attached to the ball nut 30, a clutch assembly 33 comprising an output member 34 fastened to the ball nut adapter 32 by means of screws 36, and an input member 38 rotatable on an elongated portion 40 of the output member 34 and normally disengaged from the output member, and a clutch actuating mechanism 42 which is operable to put the input member 38 into engagement with the output member 34.
- the ball nut adapter 32 includes an elongated shank portion 44 having an inside diameter rotatable on the ball screw 28, and an outside diameter rotatable relative to the cover member 16 within a bearing 46 mounted therein.
- the elongated portion 40 of the clutch output member 34 also has an inside diameter rotatable on the ball screw 28 and an outside diameter rotatable relative to the frame 12 within a bearing 48 mounted therein.
- the clutch input member 38 surrounds the elongated portion 40 of the clutch output member 34 and rotates thereon on bearings 47.
- a worm wheel 49 is attached to the clutch input member 38 by means of a key 50, and a worm gear 52, which is pressed or otherwise attached to a shaft 54 journaled in the annular frame 12, is in meshing engagement with the worm wheel 49.
- a handwheel 56 is pressed on the end of the shaft 54 opposite the worm gear 52 for manual operation of the valve operator 10.
- the clutch actuating assembly 42 comprises a clutch engaging ring 58 which is splined to the input member 38 and has a plurality of teeth 60 formed on the upper face 61 thereof which are engageable with teeth 62 formed on the lower face 63 of the clutch output member 34.
- An actuating ring 64 surrounds the engaging ring 58 and includes outwardly extending ears 65 which, as shown in FIG. 2, are attached at 66 to a block 68 which is bolted or otherwise attached to the inside wall of the frame 12.
- the opposite end of the actuating ring 64 is formed into a yoke 70 having an upper wall 71 and a lower wall 72.
- the engaging ring 58 has an annular groove 74 formed therein which receives opposed rollers 76 rotatably mounted on pins 78 threadably received on the actuating ring 64 and locked thereto by means of nuts 79.
- the actuating ring 64 and the engaging ring 58 are normally in the position shown in the solid lines in FIG. 2.
- the actuating ring 64 is pivoted from the solid line position to the dotted line position, thereby sliding the engaging ring 58 along its splined connection with the input member 38 to engage the teeth 60 formed thereon with the teeth 62 provided on the output member 34.
- An actuating lever 80 is provided to shift the actuating ring 64 from the disengaged (solid line) position to the engaged (dotted line) position.
- the lever 80 is pressed or otherwise fixed to a shaft 82 which is received through a hole formed in the frame 12, the axis of the shaft 82 being offset somewhat from the plane of the paper.
- the shaft 82 includes a smaller diameter and portion 84 which is formed into an L-shape with one leg 85 of the L extending outwardly from the paper as shown in FIG. 2, and having a ball 86 received thereon and retained by means of a cotter pin.
- the ball 86 is received between the upper and lower walls 71 and 72 of the yoke 70, and the actuating ring 64 is moved from its disengaged position to its engaged position by rotating the lever 80 clockwise as viewed from the right of FIG. 2 which causes the leg 85 of the shaft end portion 84 to pivot upwardly.
- the actuating means illustrated is just one of the several known means available to shift the clutch members into and out of engagement.
- thrust bearings 88 are provided between the ball nut adapter 32 and the cover member 16, between the clutch input member 38 and the clutch output member 34, and between the clutch input member 38 and the frame 12.
- valve stem 27 is stroked by pressurizing the air cylinder (not shown) to stroke the output shaft 24 and thus stroke the ball screw 28.
- the clutch assembly With the clutch assembly in the disengaged (solid line) position of FIG. 2, forces between the ball nut 30 and the ball screw 28 will cause the ball nut 30 and the clutch output member 34 attached thereto to rotate freely within the clutch input member 38.
- the lever 80 is rotated clockwise as viewed from the right of FIG. 2 to move the yoke 70 of actuating ring 64 upwardly causing the actuating ring 64 to move upwardly to the engaged (dotted line) position of FIG. 2. While this is occurring, the rollers 76 act on annular groove 74 in the engaging ring 58 sliding the engaging ring 58 upwardly on the clutch input member 38 to engage the teeth 60 formed on the engaging ring 58 with the teeth 62 on the clutch output member 34. With the clutch members engaged, the handwheel 56 is rotated to rotate the worm wheel 49.
- Rotation of the worm wheel 49 rotates the clutch input member 38, and the output member 34 through the engaging ring 58, thus rotating the ball nut 30 attached to the clutch output member 34.
- Rotation of the ball nut 30 causes stroking of the ball screw which, in turn, strokes the valve stem 27.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/270,948 US4429592A (en) | 1981-06-05 | 1981-06-05 | Valve operator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/270,948 US4429592A (en) | 1981-06-05 | 1981-06-05 | Valve operator |
Publications (1)
Publication Number | Publication Date |
---|---|
US4429592A true US4429592A (en) | 1984-02-07 |
Family
ID=23033525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/270,948 Expired - Fee Related US4429592A (en) | 1981-06-05 | 1981-06-05 | Valve operator |
Country Status (1)
Country | Link |
---|---|
US (1) | US4429592A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4616803A (en) * | 1983-08-23 | 1986-10-14 | Keystone International, Inc. | Declutchable valve override |
US4637272A (en) * | 1985-10-28 | 1987-01-20 | Sundstrand Corporation | Ballscrew actuator |
GB2205629A (en) * | 1987-05-21 | 1988-12-14 | Nat Supply Co | Valve override mechanism |
US4920816A (en) * | 1988-04-22 | 1990-05-01 | Niles Parts Co., Ltd. | Actuator with a clutch mechanism |
US5477752A (en) * | 1994-03-07 | 1995-12-26 | Dyna-Torque Company, Inc. | Valve actuator declutch mechanism |
US20080083892A1 (en) * | 2006-10-05 | 2008-04-10 | Vetco Gray Inc. | Fail-safe gate valve |
US20110120264A1 (en) * | 2009-11-20 | 2011-05-26 | Abb Technology Ag | Manual drive for an electric-motor actuating drive |
US20110167958A1 (en) * | 2010-01-08 | 2011-07-14 | Abb Technology Ag | Electric motor actuating drive |
CN102788192A (en) * | 2011-05-20 | 2012-11-21 | 浙江鼎锋流体自控设备有限公司 | Clutch type safe switchover hand wheel mechanism of pneumatic actuator |
US20140033842A1 (en) * | 2012-08-06 | 2014-02-06 | Cameron International Corporation | Linear actuator |
CN105443847A (en) * | 2015-12-31 | 2016-03-30 | 天津宝恒流体控制设备股份有限公司 | Manual and automatic clutch structure of pneumatic actuator |
CN109237113A (en) * | 2018-11-12 | 2019-01-18 | 希沃智能流体科技(南通)有限公司 | A kind of safety operation mechanism of the disengaging type switching of auto-manual |
-
1981
- 1981-06-05 US US06/270,948 patent/US4429592A/en not_active Expired - Fee Related
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4616803A (en) * | 1983-08-23 | 1986-10-14 | Keystone International, Inc. | Declutchable valve override |
US4637272A (en) * | 1985-10-28 | 1987-01-20 | Sundstrand Corporation | Ballscrew actuator |
GB2205629A (en) * | 1987-05-21 | 1988-12-14 | Nat Supply Co | Valve override mechanism |
GB2205629B (en) * | 1987-05-21 | 1991-03-06 | Nat Supply Co | Valve override mechanism |
US4920816A (en) * | 1988-04-22 | 1990-05-01 | Niles Parts Co., Ltd. | Actuator with a clutch mechanism |
US5477752A (en) * | 1994-03-07 | 1995-12-26 | Dyna-Torque Company, Inc. | Valve actuator declutch mechanism |
US20080083892A1 (en) * | 2006-10-05 | 2008-04-10 | Vetco Gray Inc. | Fail-safe gate valve |
US7523916B2 (en) | 2006-10-05 | 2009-04-28 | Vetco Gray Inc. | Fail-safe gate valve |
US20110120264A1 (en) * | 2009-11-20 | 2011-05-26 | Abb Technology Ag | Manual drive for an electric-motor actuating drive |
US20110167958A1 (en) * | 2010-01-08 | 2011-07-14 | Abb Technology Ag | Electric motor actuating drive |
CN102788192A (en) * | 2011-05-20 | 2012-11-21 | 浙江鼎锋流体自控设备有限公司 | Clutch type safe switchover hand wheel mechanism of pneumatic actuator |
CN102788192B (en) * | 2011-05-20 | 2014-07-23 | 浙江鼎锋流体自控设备有限公司 | Clutch type safe switchover hand wheel mechanism of pneumatic actuator |
US20140033842A1 (en) * | 2012-08-06 | 2014-02-06 | Cameron International Corporation | Linear actuator |
US9222555B2 (en) * | 2012-08-06 | 2015-12-29 | Cameron International Corporation | Linear actuator |
CN105443847A (en) * | 2015-12-31 | 2016-03-30 | 天津宝恒流体控制设备股份有限公司 | Manual and automatic clutch structure of pneumatic actuator |
CN105443847B (en) * | 2015-12-31 | 2018-02-16 | 天津宝恒流体控制设备股份有限公司 | The hand automatic clutch structure of pneumatic actuator |
CN109237113A (en) * | 2018-11-12 | 2019-01-18 | 希沃智能流体科技(南通)有限公司 | A kind of safety operation mechanism of the disengaging type switching of auto-manual |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BABCOCK & WILCOX COMPANY THE, NEW ORLEANS, LA. A Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:STEBVENSON THOMAS E.;REEL/FRAME:003880/0631 Effective date: 19810601 Owner name: BABCOCK & WILCOX COMPANY THE, A CORP. OF DE., LOU Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STEBVENSON THOMAS E.;REEL/FRAME:003880/0631 Effective date: 19810601 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19880207 |